TIOCSLCKTRMIOS(2const) — Linux manual page

TIOCSLCKTRMIOS(2const)                             TIOCSLCKTRMIOS(2const)

NAME         top

       TIOCGLCKTRMIOS, TIOCSLCKTRMIOS - locking the termios structre

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <asm/termbits.h>  /* Definition of TIOC*CLKTRMIOS constants */
       #include <sys/ioctl.h>

       int ioctl(int fd, TIOCGLCKTRMIOS, struct termios *argp);
       int ioctl(int fd, TIOCSLCKTRMIOS, const struct termios *argp);

       #include <asm/termbits.h>

       struct termios;

DESCRIPTION         top

       The termios structure of a terminal can be locked.  The lock is
       itself a termios structure, with nonzero bits or fields indicating
       a locked value.

       TIOCGLCKTRMIOS
              Gets the locking status of the termios structure of the
              terminal.

       TIOCSLCKTRMIOS
              Sets the locking status of the termios structure of the
              terminal.  Only a process with the CAP_SYS_ADMIN capability
              can do this.

RETURN VALUE         top

       On success, 0 is returned.  On error, -1 is returned, and errno is
       set to indicate the error.

ERRORS         top

       EPERM  Insufficient permission.

CAVEATS         top

       Please note that struct termios from <asm/termbits.h> is different
       and incompatible with struct termios from <termios.h>.  These
       ioctl calls require struct termios from <asm/termbits.h>.

SEE ALSO         top

       ioctl(2), ioctl_tty(2), TCSETS(2const)

COLOPHON         top

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Linux man-pages 6.10            2024-07-23         TIOCSLCKTRMIOS(2const)

Pages that refer to this page: ioctl_tty(2)

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